The Senate is voting on the resolution to block some of the Saudi Arms deal today at 2pm EST. The vote is expected to be close.
You can watch LIVE on C-SPAN 2.
The $510 million munitions sale is part of the $110 billion arms agreement that Trump touted during his visit to Saudi Arabia last month.
The senators are able to object to that portion of the sale because it has been noticed by the State Department, where foreign military sales are subject to a 30-day congressional review period.
Most of the $110 billion Saudi sale has not yet reached that phase. Defense News reported last week that $85 billion of the deal is made up of potential sales that still need to be finalized.